Aygestin with antibiotics: interactions and safety

Antibiotic courses are common, short-term and often combined with chronic medications such as Aygestin (Norethindrone Acetate). Most antibiotics do not interfere meaningfully with Norethindrone at 5mg, but a few classes do, and a small number of combinations are best avoided.

Common antibiotic interactions

Macrolides (clarithromycin, erythromycin) and certain antifungals can inhibit hepatic metabolism (CYP3A4) and raise plasma levels of many medications including some Women's Sexual Health agents. Rifampicin has the opposite effect, accelerating metabolism. Most penicillins, cephalosporins, fluoroquinolones and tetracyclines have no clinically meaningful interaction with Norethindrone at 5mg.

Practical guidance

According to the prescribing information for Norethindrone, an antibiotic course should be reviewed by the prescriber or pharmacist for known interactions before Aygestin is co-administered. Adjusted 5mg dosing or temporary substitution is sometimes preferred for the duration of the antibiotic course.

Frequently asked questions

Can I take Aygestin during an antibiotic course? ▾

For most common antibiotics, yes. A few classes — notably macrolides and azole antifungals — alter how Norethindrone is metabolised and may need a temporary 5mg adjustment. The prescribing pharmacist should review any new antibiotic against the existing Aygestin regimen.

Will antibiotics make Aygestin stop working? ▾

Most antibiotics do not affect Aygestin efficacy. Rifampicin and a few others can lower Norethindrone levels and reduce effect; in those cases the prescriber may adjust the dose during and shortly after the antibiotic course.

More on Aygestin

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